Parametrize socket_mem for dpdk vrouter

Change-Id: Ic91e036120fd5b8f0611603bc01154ff1eb6648d
diff --git a/README.rst b/README.rst
index 574d476..dc1597f 100644
--- a/README.rst
+++ b/README.rst
@@ -697,7 +697,8 @@
       compute:
         dpdk:
           enabled: true
-          taskset: 0x0000003C00003C
+          taskset: "0x0000003C00003C"
+          socket_mem: "1024,1024"
         interface:
           mac_address: 90:e2:ba:7c:22:e1
           pci: 0000:81:00.1